Trying to get some ideas of what to check for a shaking I am having at highly speeds. The shaking is not constant you feel the Car vibrate for a couple seconds and then its smooth for a couple Seconds not sure if it is starting in the rear and shimmying to the front or visa versa. I really Start to notice it at 80and from there it gets worse. I Just dint know chat would cause this because a imbalanced tire would shake constantly. I had a car that had this before and it was a u Joint on the drive shaft but I tried moving the u joints to See if there was play but there wasn't any, Could it still be the u joints? is there a different way to check.

 

wheel bearing or suspension joints possibly. jack up the suspension and put your hands 12 and 6 o'clock on the tire and try moving it (push with one hand, pull with the other) to check the wheel bearing. maybe you have a huge wing thats coming loose?

 

I'll try that out. I have coil overs So I don't think it's the Suspension

 

i mean like the steering arm or the ball joints at the hub, not the actual struts themselves. others than those few thing im not really sure about anything else...

 

Go to your tire shop and check the balance on your wheels/tires. A balance issue doesn't always shake constantly. Start with the easiest first. Also, are you sure your vibration is speed dependent, or is it RPM dependent?

 

Its speed, It does it with or without load in gear or in neutral coasting, Same vibration

 

does it change when you turn? if the sound changes when you put load on one side vs the other, its a wheel bearing. try taking some corners and paying attention to the sound

 

no sounds when i turn at lower speed and i dont want to turn at 80+ that may be dangerous LOL, i have had 3 wheel bearings replaced the left rear is the only one that has not been replaced.

 

I am having the same thing starting to happen on my car.It seems that after 72mph i have this weird shudder thruout the car for a second or two and it keeps repeating itself.I got to get this car on a lift and see whats up cause it just annoys the hell out of me.

 

I started getting this (80mph and on) when I put new wheels & tires on. They've since had the tire pressures re-adjusted and I still get it...not sure what exactly causes it.

 

got the same problem on mine, seems to get better when i get the tires balanced but only a little bit better, when i had my 17in stocks on i couldn't feel it but now i guess with the lower profile tire its more noticeable

 

do your aftermarket wheels fit snug on the center hub?

 

yup funny thing is it hasn't gotten any worse though, it got better after i took off the tsw wheels and put on the 5zigen though

 

yeah they fit snug and i didnt ave this problem at first buy i just noticed it one day. and it's been doing it for a while. and like someone else said sometime every once in a while it seems to get smooth but after a turn or i stop and get back up to speed it does it again. i do notice the vibrating before 80 but it is very light but at 80 you can really feel it.

 

weird that so many are having the problem

 

i went by a nissan dealer but i have so much done to my car they told me to leave LOL but i have had others that have helped me in the past for other issues. i dont know what to do at this point.

 

are you still under warranty?

 

i would start with borrowing a set of stocker's and going for a ride,even if it's not the wheels you may have shifted a belt in one of your tires.any monster potholes get in your way lately?u-joints are usually noticeable around 35,tires around 55 and bent wheel or belt shift will be all over the place coming and going most noticeable at high speed.80 only in my experience has been wheels not on hub tightly and shifting around,you acually get a "bounce" off of the tire at high speed.again put stockers on for process of elimination,if you still have the problem at least you can check tires/wheels off the list.

 

I also have this problem. It all started the day I switched out my rims. Since then I have replaced the suspension, tires and rims but the problem is still there.

Car acts fine until I pass 72-75mph then I get this weird vibration that comes and goes. I did hit a huge pothole when I first switched out my stockers on the front passengers side which dented a rim and blew the tire. I am guessing the bearing is messed up as well.

I have purchased a replacement to see if it fixes the problem. If that doesn't work ill put back the stockers and see if it might be due to my rims which I doubt b/c im on my second set of aftermarket wheels with the same issue???

 

could be a wheel bearing but i think the key word's here are "aftermarket wheels".if you still have a stock set it's a free test.